Molding apparatus



Sept. 7 1926. 1,599,379

J. R. FREEMAN v MOLDING APPARATUS Filed Sept. 16, 1924 Y INVENToR.

Patentedsreprt. 7, 1926. l v 'l i fJoHN R, FRE-Ellian, Beisein, Ney/Yonge AssIcfNoR rofArrnEicANRanInrroR p Coli/Iran?, orivrxw vomi,I Y., Arconrormrron or NEW JERSEY;

' Y iyroLnrNe nrrARA'rUs.

' iAppilic'aton' led September kMy invention relatesbroadly and genver-ally f to new and -usefulimprovements in molding apparatus, .andomore 'particularly yof that vtype in which a sand mold is' formed by a sui-tablefpatternior the casting of me tallic objects.

` In the art gtoWhichtheinvention relates, it is the practice `to form afsand smold by properly positioning aila'sk meinber, i..y e., the" copeor the drag inv relation vto a pattern, `pac` lzing the sand-Ain said .member so 'asto' conforin to the'pattermand then assembling the -lask members so as Ato match the sand mold parts contained therein. In this pracf tice it is usual V.to fprovidevguide means ffor e properly'holding "orVr positioning the .flask `element relative to. the p atteim'and alsoffor ,locating the cope andfdrag assembled.'

relation to each otherfso that the sandv 4mold sections' or partsflivillfproperly match. It `sometimes occurs that :through inaccuracy of the partsporjexpansmn or contraction'of the ,metallic flaslrfelements, the usual guide means employe'd'wvil'lnot cause .the coacting elements toprop'erlyfregister 'or match, and it yis 'thereforethe' primary object ot the "invention te provide `a A guide` Ameans readily applicabletoeither a patternmember, or :a flask member," to .automatically compensate for such inaccuracy orexpansion `,or contraction that the parts when assembled Willjloe Vin proper relation to eachother. 5

The inventionconsists inthe improved .construction of parts yand their aggroupment in operative combination, y,to beimore fully described hereinafter, 'and the` novelty oi'H which will Vbe particularly Ypointed out and I Y distinctly claimedT ,4

Yto

Inltheaccompanyung drawings to be taken 'as a part of this specification, I-ha've fully vand clearly illustrated: :a f preerredfeinbOdiment of my invention,l andin Which- Figure is a vieu7 in vertical longitudi- 'Vn'a-l central lsection through a' Astructure* showingl the invention in' v:anembodiment for properly guiding or holding :a flask .member relative Ato a pattern member While a sand mold is being Vformed in the flask member.

lTig. 2 is an enlarged view, partly'infsec- .OYHO the embodiment 'of the invention shown rin Figfl; j i l rig. s Saai demutop lpianl View of the construction shown Fig. 2. u Before proceeding yvitlr scription f of 'the- [preferred embodiment detailed aeis, isi. serial' No. ,verace shovvn, I VWou-ld state Whiley the inven- :tion .is shown as appliedto :a pattern stand l or support, it isivith equal facility/land W-ithofuft, essential change applicable to a fmoldpart orsectio-n, 'for example the gdrag,

ing mold members. '1

Referring to Ythe drawings, A'1vdesigillfles, generally, a pattern sta-nd or `support,:which may be of any `Welllnovvn or suitable con-y struction.' 4The stand supports, on=its upper' vportion a horizontal talo'leaor plat-form",2, having at {itsopp'osite ends l-ugsor Lprojecco Y s oi as to properly locatefthe cope with relag -tion thereto. Therefore, I 'vvishfitnnden tions B, 4, for aL purpose to be presently,,def scribed.v Supported Jon, and suitably con-V nected to the' tableQ, isn ahorizontallyjdisposed ,pattern plate 5,qhavingfon.` its upper surface any suitable Jform of `patternff,v

:the configurationiof-Which is .to vbe imparted Y V- r `to the sand mold to beformed. ".At its'endsl the lpattern plate is provided -With projections or lugs 17', 8,1Which respectively overlieH the projections 'Sand 'll'he'retofore described.;

lSupported at one end of the stand, for-exil Yample-bythe lugs 3 and 7 is a guide pin 9,

which may,pii` desired, but not necessarily,

be oaWellknoWn .fixed type. Y Ignthe present embodiment the'pinQf-includes an upper frustro-'conical portion l0, a cylindrical holding portion '11, having Vva shoulderV resting on the :upperiace ofI the-lug?, and said pin having athreadedlshanlrl, Wh/icligprojects through openingsfor slots inthe lugs 7 andV 3, and receives atitslover end `below 'lug ,3, :,ayc'lamping n-ut 13, *by` which the pin is clamped :rigidlyin position. At its oppo- `vvsite end from fthe lpin 10, the molding element,. for example `,'-the-;stand, or pattern Apla'te,'is provided, With `the automatically ad-` justable gu'idingfor ypositioning device constituting my invention, whichv will now be described:l

The lugs or projections 4 andy areprovided respectively With-longitudinally eX- tending through slots 1h15, which aline ,ver tically with each other, and ythe corresponding side Walls of 'which lie in the same Yver-` tical plane, said'slotsbeing closedfat their los innerxends,;as atl, 17; Arranged in these 1 slots 14:, 15, is' a guide element in the -form ofV a pin 18, having an upper frustro-conical portion 19 and a cylindrical holding portion2O located Vabove the lug 8, and at the base of which isy an annular shoulder 21.

f v'Beneath the shoulder 21 said pin'isformed Y with a cylindrical portion 22 located within the slots 14 and 15, and ofA less diameter `than the width of said slots, while at its 'lower end the pin is formed with a threaded shank v23 projectingbelowv the lower Vface of the lug 4. I

' Rigidly mountedon the pin part 22 is. a bushing-24 having opposite fiat faces 25 parallel to each other and adapted to closely but slidably engagefthe inner faces of the side walls of theslots 14, 15.

also'rock therein, as will more fully appear hereinafter'. The bushing is preferably secured in place by a press-fit on the cylindrical part 22.

Upon the cylindrical part 22 and abutting the shoulder 21, is a friction plate l2-6",`prefY erably inthe form of a metallicy washer `which lies upon the upper horizontal face of the lugV 8, and on the lower end portion of l the pin is a friction plate 27,`preferably in the form of a' washer whichis arranged in Yengagement with the under Vface of thelng On the lower end of the shank/or por V tion 28 of thepin, is adjustably threaded ILO a stop collar or nut 28, between which and the plate 27, is disposed a coiled spring 29 surrounding said shank, and which. exerts its force expansively against' said plate and collar to maintain plate 26 in strong frictional engagement with the lu 8 and the 1 P C' b 1 v platev 2r in strong frictlonal engagement vwith the lug 4. The collar'may be held in adjusted'position by means of a Cotter-pin 30 extending through `said collar, and a snit-- ably locate-dtransverse opening l31 in the pin 18. By this arrangement the pin 18 will be heid in vertical position relative to said lugs, butV at the same time can be moved lengthwise of theslots, in a manner to be presently described. f

rllh'e onter open ends of the slots 14, v15

are closed by suitable means, preferably in 'invention as appliednto a pattern stand upon which 'flask partsare placed when the sand mold is to be formed, and F ig. 1, I have shown flask part in the position assumed thereby` when mounted on' the stand. In this figure the flask 35 is of a standard rectangular form, having' end walls 36, and

apertured guide or positioning lugs 37, the

By this ar- Y Yrangement the guidepin 18 may slide latorally `of itself inthe slots 14,15, and mayV apertures of said lugs receiving or setting over the 'pins 9 and 18 when the flask is in position kon the stand for making of the mold. 1t will be readily understood that in a foundry of large capacity where many iasks ofthe type mentioned are employed, and are to be supplied with said molds at vthe same lpattern stand,'that due to variations in distance between the lugs 37 for any reason, forf example because of heat expansion, Vif theI pins 9Y and 18V were fixed, the

flasks could not befplacedy on the stand, or ,could not be properlyy positioned thereon relative to the patternpas the 'distance between centers of the openings in. lugs; 37

might notV permit the openings to' properly This objectionable condir receive the pins. tion 1s overcomeby ,myv invention, because when the aperture in lug 37 1s placed,y over the pin 18, the latter willbe'` automatically Vmoved to take 'such position that the flask Trmay ybe moved down into proper position on the pattern stand. Y For-example, in the event a fiask is brought tothe patternstand for the mold making, and thedistance between centers of the openingsinl the flugs? is less than the distance between the pins 9 and 18, when one of the lugs is adjusted on the pin 9, and theotherY lug isfplaced'on pin 18, the outermost face of the yapertiui'e in said last-named' lug willstrikeagainst which willmove the upper end of Apin 18 inward toward the left-fof Figs. land 2, the part 22 rocking or cantingover in its bearing. vWhen the flask part is moved farther down, the pin vis moved over' until the outermost part 'of the opening in lug 37 reaches the cylindrical part 20,- whereupon-y vthe pin-willbe straightened up and hold the liask part in proper position. Ifthe distance between centers of the Vopenings-in the ylugs 37 is greater than thedistance between the pins, the opposite result takes placee- Y vthat is, the innermost faceof the-aperture yin lug 37 engages theinnermost face of *the conical part 19, and-the pin 18 ismoved Voutw ard in a manner which is readily under! stood Vfrom. the above. It will be .apparent that the yielding frictionV connection between the pin 18 and the 'molding een'ient'on which 'theoutermost face of the'inclinedpart 19,

ii o

it is mounted, permits movement of the pin s Y as described, and also holds the pinV in proper adjustedposition to which it may be moved. YBy this means the. pin is automatically ad-v justed by engagement of the cooperating mold element therewith, and no attention on the part of the operators isnor'mally necessary. Y However, the'pin may be' adjusted manually and will retain itsadjusted` positioniwithout the necessity ofV loosening and'- Vreengaging any parts; Y i Y 1What II claim and desire tosecure by'Let- `ters Patent of the United States iste-f l i In a molding Vapparatus of the'charac- 5 ter described,l a molding 'ele-ment, a guide by element therewith, `and vyi' means permitting such`r 1movement and' holding said pin in a position to which fitymay be moved '2. In a molding apparatus of the; charac-"- k j on said pin' and slidably fitting said slot, `and' ter described, a molding'element provided with ,a,.pro.jection', a `guide pin mounted on said projection for gagein'ent of a cooperating molding element therewith, and yielding friction 'meanscarried by said pin and engaging said pro i ection.

3. In a molding apparatus of the character described, a molding element provided with a projectiomfa guide pin mounted on said projection for vlateral movement by engagement of a cooperating molding element therewith, and yieldingmeans maintaining said friction meansrin engagement with said projection.

il. In a molding apparatus of the character described, a molding element provided with a projection,l said vprojection fo-r lateral movement f by engagement of a cooperating molding element therewith, and yielding carried by said pin and movable longitudinallyk thereof and engaging said projection.

5. In a molding apparatus ofthe characterdescribed, a molding element provided with a projection, a guide pin mounted on said projection for lateral movement by engagement said pin, and means for yieldingly maintaining lsaid plate in engagement with' said projection. v i

6. In a molding apparatus of the character described, a molding element provided with a projection, a guide pin mounted on said projection for lateral-movement by engage-k ment of a cooperating molding element therewith, a friction plate carried by said pin, and a spring on said pin for yieldingly maintaining said plate in engagement with j said projection.

, described, a molding element 7 In a molding apparatus of they character provided with a projection,` a guide pin mounted on said projection for lateral movement by engagement of a cooperating moldingv element therewith,'a friction plate vcarried by said pin, an abutment on said pin, and a spring between said labutment and plate for yieldingly maintaining said plate ywith said projection. j

8. In a molding apparatus of thecharacter in engagement described, a molding element provided with a projection having an opening, a guide pin 'ection and laterally mov-` carried by said proj able in said opening by engagement of va cooperating molding` element therewith, and

lateral movement by en' a guide pin mountedv onV friction means of a cooperating molding ele-v ment therewith, a friction plate carried bylmolding element therewith, a bushing yielding'v friction means 'carrie'dlbysaid pin ancl;'e'iifgaiging said"projection.

l0.v In a molding'apparatus of the character described, a molding element provided v with a projection having a slot, a guide pin extending through said'slot, said pin having a shoulder, a plate on said pin and' engaging one side of said projectionfand held in such engagement by opposite side of' said projection7 and spring means holding said second plate in yielding engagement with said projection. l

1l. In a molding apparatus of the character described, a molding element provided withl a projection having an opening, a guide pin carried l laterally movable in vsaid openingv by engagement of va cooperating moldingelement therewith, said pin having a shoulder, a plate on said pin and-engaging one side of said projection and abutting said shoulder,

by said projectionl and` said shoulder, a second plate movable on said ypin andengaging the a second plate movable on said pink and en- 4 gaging the opposite side of saidprojection, an abutment on ysaid pin, 'and' a spring between said abutment and plate Vfor "yieldingly maintainingA said second plate in engagement with said projection.

12. -In a'niolding apparatus of the character described, a molding element provided with a'projection having an opening, a guide pin carried by said'projection and laterally movable in said opening cooperating lmolding element pin having a shoulder,a plate on said pin and engaging one side of said projection and abutting said shoulder, a secondplate movable on saidfpinand engaging the opposite side ofsaidl projection, an abutment threaded on said pin, and a spring between said abutment and4 plate for yieldingly maintaining said second plate in engage ment with Vsaid projection.

therewith, said 13.- In a moldingrapparatus of the char-- acter described, a molding element provided with a projection having an open-ended slot, a guide pin mounted for' lateral movement in 'said slot by engagement with acooperating niolding element, yielding friction means carriedbysaidpin and engaging said projection, and a filler closing the open end of said slot and limiting movement of said pin.

by engagement of a iis iso

v14. In a molding apparatus of the charj i ection having an open-ended slot,

' ing molding element,v yielding `friction means carried by said pin and engaging said pro-V jeotion, and aillei' of compressible material o Vclosing the open-end of said Vslot and limiting movementof said pin. -Y Y Y l5. In ra moldingapparatus of the char- Va'eter described, a, molding element provided with a-pi'ojeotion having' an open-ended slot, a guide pin mounted foi1 lateral movement in said siot by engagement with a cooperating molding` element, yielding friction means carried by said pin and engaging said projection, a illeiof `Compressible material Closing `the open end of said slot and limiting movement of said pin7 and a pin extending through rsaidpfojeetion and filler to hold the latter inY position. Y

In 'testimonyY whereof Ilhave hereunto subscribed -my name.

, rrlrrJOHN FREEMAN. f 

